Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdee4893693932cd…

MALICIOUS

PDF

46.0 KB Created: 2020-09-30 17:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c1f33926346860f90d0226af1d01d2dc SHA-1: ab7625c70d4ed4b8b0e2fd9642734fe4f6b99eae SHA-256: bdee4893693932cd36cfb676cd88b14bb3d58126bc666ec19382c818616f9f16
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/strik?keyword=current+management+of+hepatic+encephalopathy+pdf In PDF document text
    • http://files.dappledblue.com/uploads/1/3/0/8/130814195/baguserusijizudej.pdfIn PDF document text
    • http://files.rickydooley.com/uploads/1/3/2/6/132680864/zalifawi-matagokamobedib-wubur-dolawiwuku.pdfIn PDF document text
    • http://files.joecostin.com/uploads/1/3/1/4/131437029/2092903.pdfIn PDF document text
    • http://zirunu.wendybrittonceramics.com/uploads/1/3/0/8/130814017/3897859.pdfIn PDF document text
    • http://files.agv101.com/uploads/1/3/0/7/130775561/7587392.pdfIn PDF document text
    • http://files.frogspecialties.com/uploads/1/3/1/3/131397946/9686097.pdfIn PDF document text
    • http://ririg.nataliecummingssoprano.com/uploads/1/3/1/4/131407469/1859145.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8501/2900/files/18343576127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4111/9647/files/appareil_digestif_de_l_homme_schma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5726/5305/files/johnny_mad_dog_trailer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/5193/2837/files/how_many_atoms_are_in_glucose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8368/5274/files/vidadepin.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000761d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x761D 5400 bytes
SHA-256: 65ce5beadfab93d0ad288573ba3d36f7c90a9038e6d204bab50227584e586e03
font_01_sfnt_off0000885a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x885A 10428 bytes
SHA-256: dc254fbe3691844bc139235673645d5eddffa7a111cf66c57d9189b5b62eac0d